Station list     Available data
ILLINOIS RIVER BASIN


05576500       SANGAMON RIVER AT RIVERTON, IL

 

LOCATION.-- Lat 39°50'35", long 89°32'50" (NAD of 1927), in NW1/4NE1/4 sec.16, T.16 N., R.4 W., Sangamon County, Hydrologic Unit 07130008, at right abutment on former U.S. Highway 36 bridge in Riverton, 2.2 mi downstream from Sugar Creek, 5.6 mi upstream from Fancy Creek, and at mile 83.1.
 

DRAINAGE AREA.-- 2,618 mi2.
 

PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE
 

DISCHARGE: February 1908 to September 1912, August 1914 to September 1956, and January 1986 to current year.
 

STAGE: Water years 1994 to current year.
 

PARTIAL RECORD: Annual maximum, water years 1957-85.

SURFACE-WATER QUALITY
 

CHEMICAL: Water years 1978-91.
 

MISCELLANEOUS: Water years 1998 and 2002.
 

REVISED RECORDS.-- WSP 1208: 1908-9, 1921-22, 1926-27, 1947. WDR IL-75-1: Drainage area.
 

GAGE.-- Water-stage recorder, U.S. Army Corps of Engineers satellite telemeter, and crest-stage gage. Datum of gage is 508.38 ft above NGVD of 1929 (508.06 ft NAVD 1988). Prior to Aug. 14, 1934, chain gage on old Wabash Railway bridge (currently Norfolk and Western Railway bridge), 1,450 ft downstream, at datum 5.61 ft lower.
 

REMARKS.-- Some regulation by municipal reservoirs at Decatur (since 1922) and at Springfield (since 1934).
 

EXTREMES FOR PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 68,700 ft3/s, May 19, 1943, gage height, 31.52 ft, from graph based on gage readings; minimum daily, 3.0 ft3/s, Oct. 3-15, 1914.
 

EXTREMES OUTSIDE PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE: The high water of 1883 reached a stage of approximately 32 ft with respect to the gage at the old Wabash Railway bridge. The high water of 1875 is said to have been about one-half foot lower.
 

REMARKS FOR CURRENT YEAR.-- Records fair except those for estimated daily discharges, which are poor.
Discharge, cubic feet per second, WATER YEAR OCTOBER 2004 TO SEPTEMBER 2005
DAILY MEAN VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
 
1 161  2980  10600  e1500  2660  2370  1810  998  487  172  99  77 
2 165  3380  11600  1580  2380  1910  1760  923  469  163  98  73 
3 167  3930  12200  2120  2370  1900  1720  865  456  158  98  72 
4 176  4470  12000  4440  2200  1920  1670  833  439  153  117  70 
5 161  4700  11300  7430  2060  1950  1470  796  393  162  113  76 
 
6 153  4660  10500  13500  2130  1670  1420  766  348  167  99  76 
7 155  4580  10400  19500  2810  1710  1420  708  336  156  91  70 
8 162  4350  11200  20900  3740  1640  1450  574  344  144  88  70 
9 165  3750  12800  21100  4680  1550  1440  597  364  138  89  71 
10 173  3340  13100  19600  5450  1540  1190  625  355  134  86  74 
 
11 163  2980  12800  16800  5760  1440  1140  630  315  133  85  71 
12 164  2490  12400  15400  5500  1070  1370  993  307  142  84  74 
13 194  2230  12100  20200  5740  1030  1810  1490  451  148  99  74 
14 229  2020  10800  28800  7820  1310  1690  1120  1080  163  137  82 
15 235  1940  9270  31400  9340  1270  1550  856  2600  145  127  79 
 
16 232  1850  7940  29800  9950  1190  1480  777  2120  135  113  103 
17 219  1830  5970  26700  9430  1180  1370  734  1290  161  98  104 
18 428  1910  4420  22700  8740  987  1260  662  1010  166  92  90 
19 2480  1850  3480  18800  8370  983  1110  791  820  211  166  86 
20 2210  1460  3270  13900  7170  951  857  1050  668  224  137  124 
 
21 1490  1820  2860  10400  6160  945  776  995  531  159  131  157 
22 1600  2830  2410  7650  4840  974  1060  1100  399  169  98  113 
23 1600  1720  2220  5900  3840  1370  1330  1040  350  168  90  108 
24 1160  1500  1940  4470  3470  1380  1360  941  329  143  94  151 
25 951  3950  e1700  3790  3040  1690  1460  845  304  124  84  212 
 
26 977  6070  e1550  3570  2710  2650  1160  743  292  113  87  151 
27 1690  7110  e1450  3300  2750  2900  1540  639  296  114  85  211 
28 2280  8230  e1400  3080  2490  2830  1490  542  222  131  84  141 
29 2430  8610  e1350  3080  ---  2920  1210  505  195  119  84  122 
30 2430  9020  e1300  3190  ---  2350  1040  503  183  104  79  126 
 
31 2530  ---  e1400  3020  ---  2000  ---  503  ---  100  82  --- 

TOTAL 27330 111560 217730 387620 137600 51580 41413 25144 17753 4619 3114 3108
MEAN 882 3719 7024 12500 4914 1664 1380 811 592 149 100 104
MAX 2530 9020 13100 31400 9950 2920 1810 1490 2600 224 166 212
MIN 153 1460 1300 1500 2060 945 776 503 183 100 79 70
CFSM 0.34 1.42 2.68 4.78 1.88 0.64 0.53 0.31 0.23 0.06 0.04 0.04
IN. 0.39 1.59 3.09 5.51 1.96 0.73 0.59 0.36 0.25 0.07 0.04 0.04
e Estimated
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1908 - 2005, BY WATER YEAR (WY)
MEAN 839 975 1214 1996 2355 2764 3230 3282 2374 1086 513 562
MAX 12280 5516 7500 12940 7762 8117 14100 16760 8596 4819 5914 12730
(WY) 1927 1942 1928 1950 1951 1939 1922 1943 1998 1951 1915 1926
MIN 7.29 12.6 27.5 29.5 34.6 50.8 180 113 146 49.1 40.7 22.3
(WY) 1915 1915 1915 1918 1931 1954 1931 1954 1934 1954 1936 1922

SUMMARY STATISTICS FOR 2004 CALENDAR YEAR FOR 2005 WATER YEAR WATER YEARS 1908 - 2005
ANNUAL TOTAL 939350        1028571     
ANNUAL MEAN 2567        2818      1761           
HIGHEST ANNUAL MEAN 4808            1927
LOWEST ANNUAL MEAN 114            1954
HIGHEST DAILY MEAN 13100            Dec 10 31400          Jan 15 67700            May 19 1943
LOWEST DAILY MEAN 153            Oct 6 70          Sep 4,7-8 3.0         A
ANNUAL SEVEN-DAY MINIMUM 162            Oct 5 72          Sep 7 3.0         Oct 3 1914
MAXIMUM PEAK FLOW 31800          Jan 15 68700            May 19 1943
MAXIMUM PEAK STAGE 25.30     Jan 15 31.52   B May 19 1943
INSTANTANEOUS LOW FLOW 68          Sep 8,11
ANNUAL RUNOFF (CFSM) 0.980 1.08 0.673    
ANNUAL RUNOFF (INCHES) 13.35   14.62 9.14      
10 PERCENT EXCEEDS 6480        8660      4640           
50 PERCENT EXCEEDS 1600        1160      665           
90 PERCENT EXCEEDS 202        98      63           

A - Oct. 3-15, 1914.

B - From graph based on gage readings.


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Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data